Molybdenite Re-Os and SHRIMP Zircon U-Pb Dating of Duobuza Porphyry Copper Deposit in Tibet
详细信息
- 责任者：She Hongquan (Key Laboratory of Metallogeny and Mineral Assessment ; Institute of Mineral Resources ; CAGS ; Beijing 100037 ; China) ; Li Jinwen
- 刊名：Mineral Deposits
- 出版年：2009
- 卷期：28(6)
- 关键词：斑岩铜矿床 ; porphyry copper deposit ; 辉钼矿 ; molybdenite ; SHRIMP定年 ; SHRIMP dating ; 西藏 ; Tibet
- 页码：p.737-746
- 图表：6 illus., 3 tables, 24 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
The Duobuza porphyry copper deposit, the first large-size porphyry copper deposit discovered along the Bangong-Nujiang suture zone, is situated in the Duobuza tectonic-magmatic zone on the southern margin of the Qiangtang-Sanjiang massif. The main mineralized porphyry in the ore deposit is granodiorite porphyry, whose SiO2 content varies from 61.37% to 67.73%, 65.16% on the average. Its REE content is 41.4×10-6～94×10-6, and the LREE content is higher than the HREE content, suggesting the enrichment of LREE. The age of the ore deposit is consistent with the evolution of the Bangong-Nujiang archipelagic arc-basin system in Early Cretaceous, implying that the Duobuza copper deposit was formed in an archipelagic arc-basin system similar to the system of southeast Asia.